Social networking sites (SNSs) are increasingly used to communicate and to maintain relationships with people around the globe, and their usage has certainly led to incidental language gains for second language (L2) users. Language instructors are just beginning to utilize SNS sites to manage their courses or to have students practice language skills. This article examines action research studies that have utilized SNSs in language courses and other studies that have surveyed L2 learners on their attitudes and feelings concerning the use of SNSs for language learning.